| BTO | Bachman Turner O 
| Others |
| BTO | Bachman Turner Overdrive
| Others |
| BTO | Bachmann Turner Overdrive
| Others |
| BTO | Back To Office
| Others |
| BTO | Be The One
| Others |
| BTO | Betts Telecom Oklahoma
| Others |
| BTO | Bigger Than Obnoxious
| Others |
| BTO | Bilateral Tubal Occlusion
| Others |
| BTO | Bild Ton Organisation
| Others |
| BTO | Biological Technologies Office
| Others |
| BTO | Black Togetherness Organization
| Others |
| BTO | Blanket Travel Order
| Others |
| BTO | Bleed Temperature Optimized
| Others |
| BTO | Blood Transfusion Officer
| Others |
| BTO | Bogdan Theodor Olteanu
| Others |
| BTO | Boom Truck Operator
| Others |
| BTO | BRENDA Tissue Ontology
| Others |
| BTO | Brigade Tactical Officer
| Others |
| BTO | British Trust for Ornithology
| Others |
| BTO | Browe Tactical Optic
| Others |
| BTO | Build To Order
| Others |
| BTO | Build Transfer and Operate
| Others |
| BTO | Build Transfer Operate
| Others |
| BTO | Building Technologies Office
| Others |
| BTO | Bulk Truck Operator
| Others |
| BTO | Busan Tourism Organization
| Others |
| BTO | Business Technology Office
| Others |
| BTO | Business Technology Optimisation
| Others |
| BTO | Business Technology Optimization
| Others |
| BTO | Business Transaction and Optimization
| Others |
| BTO | Business Transformation Outsourcing
| Others |
| BTO | Business Tycoon Online
| Others |
| BTO | Buy This Ohhhhhmygodsogoodfrozenyogurt
| Others |
| BTO | Buy Tourism Online
| Others |
| BTO | By The Order
| Others |
| BTO | By The Outside
| Others |